Wireless telegraphy.



W W MASSIE -WIRELESS TELEGRAPHY.

nrmuguon FILED FEB. 27, 1907.

Patented Sept.v28, 1909.

fizvezz for W, 77? u a dc; W K v UNITED STATES PATENT OFFICE.

WALTER W; MASSIE, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO MASSIEWIRELESS TELEGRAPH COMPANY, OF PROVIDENCE, RHODE ISLAND, A CORPORATIONOF RHODE ISLAND.

Application filed February 27, 1907.

To all whom it may concern:

Be itknown that I, IVALTERIV. MAssIE, a citizen of the United States,residing at Providence, in the county of Providence and State'of RhodeIsland, have invented new and useful Improvements in IVireless Telegraphy. of which the following is a specification.

This invention relates to wireless telegraphy and more especially tomeans-for tuning.

The present organization can be incorporated with advantage in manytypes of sys tems; it has been employed withutility in conjunction withthe Massie wireless telegraph system as disclosed in Letters Patent, No.853,929 granted May 14, 1907.

Wireless telegraphyembodying my pres ent invention includes what isknown in the art as a magnetic detect-or. Such a device takes variousforms, it ordinarily including .a coil and at least two magnets.

One of the primary features of the present invention is for relatingthese magnets in an adjustable manner. I prefer to so dispose thesemagnets that they can be adjusted toward and from each other in adirection corresponding with thelongitu dinal axis of the said coil. Bythe adjustment of these magnets in the direction indicated I canaccurately tune a receiving circuit. I am not prepared at th1s time tostate any theory relative to the causes for such phenomena, although itis my opinion that such adjustment varies the inductance to such anextent as to assure accuracy of tuning.

In the drawings accompanying and forming a part of this specification Ihave shown a form v of embodiment of the invention which to enablethosesk-illedin the art to practice said invention will be set forth fully inthe following description, while the novcity of the invention will beincluded in the claims succeeding said description.

Referring to said drawings, Figure 1 is a diagrammatic view of areceiving circuit in connection with which is a device including myinvention. Fig. 2 is a front elevation of the magnets shown in ig. l andthe means for adjusting the same. Fig. 3 is a top plan view. Fig. L is aside elevation and Fig. 5 a cross sectional view of the parts shown inFig. 2. Fig. 6 is a perspective view of a m agn et.

Specification of Letters Patent.

shown clearly Patented Sept. 28, 1909. Serial N 0. 359,618.

Like characters refer to like parts throughout the several figures.

In Fig. l of'the drawings which is set forth as a diagrammatic view, Ihave illustrated in part a certain known arrangement of circuits exactlysimilar to that in use in the Massie system to which I have hereinbeforereferred. For this reason I do not deem it necessary to describe indetail the several connections illustrated in said Fig. 1 any more thanto indicate that the same include amagnetic detector such as that shownin a general way by 2. This magnetic detector comprises as usual twopulleys or sheaves as 3 of duplicate construction and a tubular coil as4 through which the band 5 is adapted to move. In addition to thepulleys 3, coil 4 and band 5 the magnetic detector has two magnets as 6and 7. These several parts may be and preferably are of well knownconstruction. The magnetic detector coil a presents inductance for aclosed receiving circuit. A secondary is illustrated at 8 and it may beconnected to a telephone as 9.

My invention does not reside in the detector coil itself 01 anyparticular arrangement ofwiring, but broadly in a certain adjustablerelation of the magnets of the detector. I adjust preferably both ofthese magnets toward and from each other.

It is customary to support certain of the working parts of the deviceincluding the magnetic detectorupon a casing or boxing shown partiallyin full lines in Fig. 3 and partially bydotted lines in Fig. 5, beingdenoted by 10. I have shown as fitted against this casing or boxing amagnet carrier as 11 which may consist of. a plate having on its innerface a ribbed block 12, the rib of which is adapted to slide verticallyin a way or groove in the boxing. I have illus trated as extendingthrough the top of the boxing a screw 13 having a shoulder 14 adapted tobear against the top of said lJO. I ing. The threaded portion of thescrew as in Fig 5 is tapped into the block 12. It, therefore, followsthat when the screw 13 is turned in one direction the block 12 and hencethe carrier I]. will be lifted, and that whenthe screw is turned in theopposite direction the carrier will lower or settle downward by its ownweight. The

screw,'therefore, serves to vertically adjust the two magnets 6 and 7 aswill hereinafter more particularly appear. The legs of these magnets areadjacent the coil 4. 1 They may be actually contiguous or in contacttherewith or they may be separated therefrom, such relations dependingupon certain conditions to be met which can readily be done by themanipulation of the screw 13. In addition to the vertical adjustment ofthe magnets they have a horizontal-adjustment. desire to state at thispoint that I use the terms horizontal and vertical to describe'the setof the parts shown in the drawings. It is possible that the magnets mayin use be disposed horizontally the drawingsvertically.- In this casethe magnets would be adjusted horizontally to regulate the amount ofseparation between their legs and the col of the detector and they wouldalso be adjusted horizontally to regulate their lateral separation. Inother words, I wish to make it clear that l do not limit myself toplacing the magnets in any particular plane, as the invention covers amore general relation than this.

It is my custom to removably clamp the magnets 6 and this purpose employin connection with each magnet an inner clamping member as 15 and anouter clamping bolt as 17 connecting the two clamping members.- Byloosening up on the screw, a magnet can be removed from betweensaidclamping members or jaws and a new magnet it ocbe put in its place.' 17are tightened up casion requires can When the two screws the magnets 6and 7 will be held in firm relation and against relative movement withrespect to the 'two clamping devices. The clamping. devices also providea ready means for assuring the proper leveling of the magnets. The innersections 15 of the clamping members as indicated clearly in Fig. 6 havegrooves as 18 extending along the same which are adapted to receivetongues as 19 on the opposite side of the plate 11. The two sections orblocks 15, therefore, slide horizontally upon the plate or carrier 11.

To the block 15 of the. magnet 6 is shown as connected a rack 20, whilea rack 21 is similarly connected with the block 15 of the magnet 7asshown best in Fig. In the present case the racks are of differentlengths, this being due to the space between the magnets. The racks maybe connected with the blocks 15 in any desirable way.

Upon the plate 11 I have shown mounted a bracket 22 constituting asuit-able bean ing for the vertically disposed spindle23 equippednearits lower end with the pinion A which is adapted to mesh with theteeth or the opposite racks 20 and 21 which it will be understood are inparallelism. When the spindle 23 is turned in one direcinstead of asshown in- 7 to the carrier 11 and for member as 16, a screw orof themagnets being adjustable on the cari magnets,

.lVhat I claim is: i

, 1. A magnetic detector havinga coil and magnets, and means forsimultaneously moving the magnets toward and simultaneously from eachother in a direction substantially axially of said coil; I

2. A magnetic detector having a coil, and magnets cooperative therewith,racks arranged in reverse relation and connected with the magnets, and apinion meshing at opposite sides with the racks, the pinion vformingaconnection between the magnets and when turned serving to adjust themagnets toward or from each other in accordance with the motion of thepinionand in a direction axially of said coil.

3. A magnetic detector having a coil and magnets cooperative therewith,means for relatively adjusting the magnets in a direction toward andfrom each other, and means for bodily adjustin the magnets in adiiferent direction toward and from the coil.

4. A magnetic detector having a coil and magnets, the magnets beingrelatively adjustable .in a direction toward and from each other andalso in a different direction toward and from the coil.

5. A magnetic detector having a coil and magnets, a carrier for themagnets, the'carrier being movably mounted to carry the magnets towardand from the coil and each rier for movement toward and from each other.

6. A magnetic detector having a coil and a carrier for the magnets, thecarrier being movably mounted to carry the magnets toward and from thecoil, racks connected with the respect've magnets, and a rotary pinionmeshing with the teeth of the racks, the pinion when turned serving tomove the magnets toward or from each other. g

7 A magnetic detector comprising a coil, a plurality of magnetscooperative therewith, and means connecting said magnets. for relativelyadjusting them simultaneously in reverse directions while they remain ina predetermined fixed relation to the axis of the coil.

8. A magnetic detector comprising a coil,

a plurality of magnets cooperative therewith, and means connecting saidmagnets for relatively adjusting them simultaneously in oppositedirections axially of said coil.

'9. A magnetic detector comprising a coil, a magnet cooperativetherewith, a carrier movable transversely of the axis of said coil, anda member movable on said carrier in the direction of the axis of thecoil, said magnet being connected to one of said movable parts.

10. A magnetic detector comprising a coil, magnet-s coilperativetherewith, means for relatively adjusting said magnets in a directionaxially of said coil, and means for adjusting the magnets transverselyof the axis of the coil.

11. A magnetic detector comprising a coil, and magnetscoiiperativetherewith, said magnets being relatively adjustable axiallyof the coil and also adjustable transversely of the axis of the coil.-

12. A magnetic detector comprising a primary coil, a core therein, andmagnets cooperative with the coil and relatively adjustable in adirection axially and bodily adjustable transversely thereof.

13. A magnetic detector involving pri mary and secondary coils, a corecooperative with the primary coil, and magnets cooperative with theprimary coil and relatively adjustable axially thereofl ll. A magneticdetector comprising a primary winding, a core cooperative therewith, anda plurality of magnets arranged opposite to the primary winding andhaving means for insuring an adjustment of such magnets to positionsequidistantly at oppositc sides of a given point in the length of theprimary coil.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses. t, y

. WALTER W. MASSIE. Witnesses:

L. E. HINCKLEY, C. M. RICHARDSON.

